Pinwheel



FIG. 1 is a front, right-side, perspective view of a pinwheel according to my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines are portions of the pinwheel that form no part of the claimed design. 

CLAIM The ornamental design for a pinwheel, as shown and described. 